Ditto...
Having the same issue, with a freeze at Windows logo screen and update rollbacks loop after installation of Meltdown/Spectre patch, on Windows 10 x64 Pro Build (1709 16299.125) with an HP Pavilion Entertainment PC DV2-2116WM with AMD Turion 64 X2.
I had virtualization disabled in BIOS so I may try the update once again after reviewing this community question again thoroughly.
I'm only running Windows Defender with Cybereason RansomFree and Windows Insiders builds with just fixes, apps, and drivers. I have the same setup on a newer Intel I3 based unit with no issues.
After reviewing this thread I paused updates for 7 days in Advanced Options while researching further options.
Glad to find this community question/forum and to know that other IT/Users are having similar issues.